\section{Context}
\label{sec:context}

The current Julia workflows target two distinct regional GSI configurations:
\begin{itemize}
    \item \textbf{Tutorial case} --- driven by the Fortran scripts under \texttt{/home/docker/comgsi/tutorial/comGSIv3.7\_EnKFv1.3/run/job/}, typically executed through \texttt{comgsi\_run\_regional.ksh} and validated with \texttt{run\_and\_check\_gsi.sh}.  The Julia analogue is intended to be \texttt{scripts/shell/run\_and\_check\_julia\_gsi.sh}.
    \item \textbf{MWRI regional case} --- maintained in \texttt{/home/docker/GSI/comGSIv3.7\_EnKFv1.3-mwri/test/}, executed with \texttt{run\_gsi\_regional.ksh} and verified by \texttt{check\_gsi\_regional\_results.sh}.  The Julia harness \texttt{scripts/run\_mwri\_radiance\_checks.sh} and \texttt{scripts/julia/run\_mwri\_regional\_case.jl} currently mirror this configuration.
\end{itemize}

To benchmark progress, we executed the Julia MWRI driver (log: \texttt{/home/linden/.cache/logrun/bash\_run\_mwri\_radiance\_checks-20251018\_143321.log}) and the Fortran MWRI checker (\texttt{/home/docker/GSI/comGSIv3.7\_EnKFv1.3-mwri/test/check\_gsi\_regional\_results.sh}).  We also attempted to run \texttt{run\_and\_check\_julia\_gsi.sh} for the tutorial case; it aborted because \texttt{demos/operational\_gsi\_analysis.jl} is not present in the repository, showing that the tutorial-facing harness has drifted.
